CN108507238B - Evaporator and application thereof in heat pump unit - Google Patents
Evaporator and application thereof in heat pump unit Download PDFInfo
- Publication number
- CN108507238B CN108507238B CN201810199561.7A CN201810199561A CN108507238B CN 108507238 B CN108507238 B CN 108507238B CN 201810199561 A CN201810199561 A CN 201810199561A CN 108507238 B CN108507238 B CN 108507238B
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- tube
- heat exchange
- evaporator
- exchange tube
- adapter
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B39/00—Evaporators; Condensers
- F25B39/02—Evaporators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
- F28F19/02—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using coatings, e.g. vitreous or enamel coatings
- F28F19/04—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using coatings, e.g. vitreous or enamel coatings of rubber; of plastics material; of varnish
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/04—Arrangements for sealing elements into header boxes or end plates
- F28F9/06—Arrangements for sealing elements into header boxes or end plates by dismountable joints
- F28F9/14—Arrangements for sealing elements into header boxes or end plates by dismountable joints by force-joining
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/04—Arrangements for sealing elements into header boxes or end plates
- F28F9/16—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling
- F28F9/18—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2230/00—Sealing means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2265/00—Safety or protection arrangements; Arrangements for preventing malfunction
- F28F2265/16—Safety or protection arrangements; Arrangements for preventing malfunction for preventing leakage
Abstract
The invention discloses an evaporator and application thereof, which are used for solving the problem that a welding part of a heat exchange tube is easy to leak. The evaporator comprises a shell pass and a tube pass, wherein working medium I is introduced into the shell pass, medium II is introduced into the tube pass, two ends of a heat exchange tube in the evaporator are in over-tight fit with tube plates, the end parts of two ends of the heat exchange tube extend to the outer sides of the tube plates respectively, the exposed length of the end parts of the two ends of the heat exchange tube is not smaller than the thickness of the tube plates, the evaporator further comprises an adapter, a conical sealing element and a locking nut, the adapter comprises a flange part and a cylindrical part, the cylindrical part is conical and filled with the conical sealing element, the flange part and the tube plates are welded and fixed, and the locking nut is fastened on the cylindrical part and compresses the. In the invention, the adapter and the tube plate are connected in a welding manner, so that leakage cannot occur, and meanwhile, a first-stage over-tight fit seal and a second-stage sealing sleeve seal are simultaneously arranged between the heat exchange tube and the adapter and between the heat exchange tube and the tube plate, so that liquid leakage cannot occur between the tube side and the shell side.
Description
Technical Field
The invention relates to the technical field of evaporators for heat pumps, in particular to an evaporator technology assembled by adopting a non-welding technology.
Background
A heat pump is a device that uses high-level energy to cause heat to flow from a low-level heat source to a high-level heat source. The heat pump technology is also an energy-saving technology for low-temperature waste heat utilization. The heat pump unit generally comprises a compressor, a condenser, an evaporator, a throttling device and an electric control system, wherein the function of the evaporator in the heat pump unit is crucial, and during the principle, a refrigerant is converted from a liquid state to a gas state in the evaporator to complete heat absorption, the gas refrigerant is sucked into the compressor to be compressed and then enters the condenser, heat release is completed in the condenser to be used for heating, heating water and other normal-temperature water, the refrigerant in the condenser is converted from a high-pressure gas state to a liquid state, the liquid refrigerant enters the evaporator through the throttling device to complete the circulation of the refrigerant, and the refrigerant is recycled in the process.
In a conventional evaporator, a corrosive refrigerant, such as sewage, industrial wastewater, saline wastewater, antifreeze and the like, is generally used, and when a secondary refrigerant contacts a heat exchange tube, a tube plate and the like inside a heat exchanger, refrigerant leakage may occur during a long-term operation process, and the refrigerant leakage may cause the decrease of the refrigerant and the pollution to the environment, and may cause the unit rejection.
The applicant finds that in a conventional evaporator, a refrigerant leakage part mainly occurs at a contact part between a heat exchange tube and a tube plate, and further researches find that the heat exchange tube is usually a copper tube or a stainless steel tube, and in order to increase the heat exchange effect, the stainless steel tube or the copper tube is usually used for improving the overall heat transfer coefficient by reducing the wall thickness, that is, the thinner the tube wall of the heat exchange tube is, the better the tube wall is, so far, according to the known technology and handbooks, a thin-wall tube with the thickness of 0.3 mm-0.8 mm is used for the stainless steel tube used in the evaporator, and the technical breakthrough of 0.8 mm-1 mm is realized for the tube wall of the copper tube, that is, the overall heat exchange performance of the evaporator can be effectively improved by using the thin-wall tube.
The tube plate is a plate for fixing the heat exchange tube and is usually positioned at two ends of the shell, and the material of the tube plate is usually the same as that of the heat exchange tube according to the material selection of the heat exchange tube so as to ensure the integral stability after the heat exchange tube and the tube plate are welded (avoid the phenomena of electrochemical corrosion and the like).
The heat exchange tube and the tube plate are usually connected by welding, for example, a copper tube is connected with a copper plate by brazing, and a stainless steel tube is connected with a stainless steel tube.
However, the position of the welded joint is different from that of the common copper-copper welding or stainless steel-stainless steel welding, and the skilled welder knows that the position of the welded joint is most prone to leakage, and the traditional analysis results are that: besides the pressure difference between the tube side and the shell side of the evaporator, the welding point is deformed by the tube plate (expanded with heat and contracted with cold), the heat exchange tube is deformed (expanded with heat and contracted with cold), and in addition, the welding thermal stress exists because the inside of the angle welding head is provided with stress concentration.
The applicant believes that, in addition to the above, there is an important reason that has been overlooked for a long time: that is, the difference between the wall thickness of the tube wall and the thickness of the tube plate is large, and the applicant can analyze the failure reasons of dozens of evaporators and then draw the following conclusion:
the most easily-leaked part is the welding part of the heat exchange tube, the tube wall of the heat exchange tube is usually very thin, the perforation of the heat exchange tube is easily caused in the welding process (the overpressure test can detect the leakage and carry out corresponding remedial measures), the tube wall of the welding point is thinned (is not easy to detect), the welding process is subject to the pressure fluctuation and temperature change such as the pressure rise and pressure relief of a tube side and a shell side, air holes, slag inclusion and microcracks generated by welding can be rapidly expanded under the action of similar fatigue loads to cause leakage, particularly when the thickness of the welding line is thin, the bearing capacity is more insufficient to cause perforation, and therefore, the leakage risk in the service process of the heat exchanger can be effectively reduced by protecting the part of the welding point, particularly the heat exchange tube of the welding point.
The present invention is directed to solving the above-mentioned leakage problem caused by welding, and the detailed implementation will be described in the following embodiments.
Disclosure of Invention
In order to solve the defects of the prior art, the invention provides an evaporator of a heat pump unit, which is used for solving the problem that medium leakage is easy to occur at welding points between a heat exchange tube and a tube plate in the existing evaporator and heat exchanger.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the evaporator comprises a shell pass and a tube pass, wherein working medium I is introduced into the shell pass, medium II is introduced into the tube pass, and the evaporator is characterized in that,
the two ends of the heat exchange tube in the evaporator are in over-tight fit with the tube plate, the end parts of the two ends of the heat exchange tube respectively extend to the outer side of the tube plate, the exposed length of the two end parts is not less than the thickness of the tube plate,
the pipe fitting comprises a cylindrical barrel, a flange part and a cylindrical barrel, the conical sealing element is filled in the cylindrical barrel in a conical barrel shape, the flange part and the pipe plate are welded and fixed, and the locking nut is fastened on the cylindrical barrel and tightly presses the conical sealing element.
Further, the adapter corresponds to the heat exchange tube concentrically.
Furthermore, the heat exchange tube is a stainless steel tube or a copper tube with the thickness of 0.2 mm-0.8 mm.
Furthermore, the ratio of the wall thickness of the heat exchange tube to the thickness of the tube plate is 1: 60-1: 30.
Further, the thickness of the adapter is equal to the thickness of the tube plate.
Further, the heat exchange tube and the tube plate are assembled by a cold and hot assembling method.
Furthermore, the fastening nut, the adapter, the heat exchange tube and the tube plate are made of metal of the same material.
Furthermore, the lower part of the tube pass is provided with an inlet, an outlet and a sewage discharge outlet of a medium II, which are separated by a partition plate, and the top of the tube pass is provided with an air release port; and a refrigerant inlet, a refrigerant outlet, a safety pressure relief valve and a thermocouple are arranged on the steel shell of the shell pass.
Furthermore, a plastic lining layer or a polytetrafluoroethylene coating is sprayed on the inner walls of the shell pass and the tube pass.
The evaporator is applied to an evaporation link in a heat pump unit.
The invention has the beneficial effects that:
1. the heat exchange tube is easy to replace, the welding points are transferred to the adapter and the peripheral area of the tube plate instead of directly welding the joints between the heat exchange tube and the tube plate, when the heat exchange tube needs to be replaced, only the welding points between the adapter for fixing the heat exchange tube and the tube plate need to be polished and eliminated, then the heat exchange tube is taken out, and after the heat exchange tube is taken out, a new heat exchange tube is replaced, and the adapter can be reused. When the traditional heat exchange tube is replaced, the shape of a round hole of the tube plate can be damaged, and the tube plate is damaged.
2. The adapter and the tube plate are connected in a welding mode, leakage cannot occur, meanwhile, one-level over-tight fit sealing and two-level sealing sleeve sealing exist between the heat exchange tube and the adapter and between the heat exchange tube and the tube plate, sealing is good, and liquid leakage cannot occur between the tube side and the shell side.
3. The end part of the heat exchange tube is subjected to tube expansion process treatment, after the tube expansion process treatment, the strength of the end part is not changed greatly, but after a stainless steel sleeve is arranged in the tube expansion part by adopting a cold assembly method, the local strength enhancement can be carried out on the tube expansion part, and the clamping effect under higher strength can be realized by matching the locking nut and the conical sealing element on the outer side.
4. The welding requirement is reduced, the welding quality requirement between the traditional heat exchange tube and the tube plate is extremely high, and the welding quality requirement is reduced by transferring the welding point between the conversion piece and the tube plate, namely, the technical requirement can be met by common welding.
5. The use of the stainless steel sleeve enables the tube wall thickness of the heat exchange tube to be further reduced, theoretically, the tube wall thickness of the stainless steel tube can be reduced to about 0.2 mm, namely, the stainless steel tube with the thickness of 0.2 mm can be smoothly used in the evaporator.
Drawings
Fig. 1 is a schematic diagram of an internal structure of an existing condenser.
Fig. 2 is a diagram of welded connection nodes (upper ends) between heat exchange tubes and tube plates in an original condenser.
Fig. 3 is a diagram of welded connection nodes (lower end) between the heat exchange tubes and the tube plate in the original condenser.
Fig. 4 is a diagram of a welded connection joint between a heat exchange tube and a tube plate (upper end) in the first embodiment.
Fig. 5 is a diagram of the welded connection node between the heat exchange tubes and the tube sheet (lower end) in the first embodiment.
FIG. 6 is a diagram of the welded connection node between the heat exchange tube and the tube plate in the second embodiment.
FIG. 7 is a diagram of the welded connection node between the heat exchange tube and the tube plate in the third embodiment.
FIG. 8 is a perspective view (partial) of a heat exchange tube according to a fourth embodiment.
In the figure: 100 shell sides, 110 steel shells, 111 refrigerant inlets, 112 refrigerant outlets, 113 thermocouples,
200 tube passes, a vent 210,
300 heat exchange tubes, 310 expanded ends, 320 spiral tubes, 330 straight tubes,
a 400-tube plate is arranged on the upper surface of the tube plate,
510 adaptor, 511 flange, 512 cylindrical, 513 threaded, 520 cone seal, 530 lock nut,
600 stainless steel jacket.
Detailed Description
The design principle and the operation effect of the present invention are explained in detail by the embodiment as follows:
referring to fig. 1, the evaporator includes a shell side 100 and a tube side 200, wherein a working medium introduced into the shell side is a refrigerant, and a medium introduced into the tube side is heating return water, wherein a steel shell 110 of the shell side 100 is provided with a refrigerant inlet 111, a refrigerant outlet 112, a safety relief valve and a thermocouple 113, wherein the refrigerant inlet 111 is located at an upper portion, the refrigerant outlet 112 is located at a lower portion, and a spoiler (not shown in fig. 1) may be further added into the shell side, so that a path is extended in a process that the refrigerant flows from top to bottom, and a heat exchange path is increased.
In the tube pass 200, the lower part is a water inlet and a water outlet of the aqueous medium, which are separated by a partition board, and are marked as a first cavity a1 and a third cavity A3, the top of the tube pass 200 is a second cavity a2, which realizes the reversing of the aqueous medium, and a vent 210 is arranged on the shell of the second cavity a2 for discharging the redundant gas in the aqueous medium, and drain outlets (not marked in fig. 1) are arranged on the shells of the first cavity and the third cavity for discharging the redundant impurities in the aqueous medium.
Plastic lining layers or polytetrafluoroethylene coatings can be sprayed on the inner walls of the shell pass 100 and the tube pass 200 as required to enhance the corrosion resistance.
In the conventional evaporator, the welded connection between the heat exchange tube 300 and the tube plate 400 is as shown in fig. 2 and 3, that is, the welded connection is made to the tube plate at both ends of the heat exchange tube by welding.
The improvement of the invention is that:
referring to fig. 4 and 5, taking a heat exchange tube 300 made of stainless steel as an example (hereinafter referred to as a stainless steel tube), the wall thickness of the stainless steel tube is 0.5 mm, and the tube plate is in the thin tube category, and a stainless steel plate with a thickness of 30 mm is adopted as the tube plate, wherein the ratio of the wall thickness of the heat exchange tube to the wall thickness of the tube plate is 1:60, and when the heat exchange tube is connected by adopting a traditional welding process, the problems of spot welding perforation, deformation and thinning easily occur. The tube plate in the invention forms a flange structure by machining, the tube plate is connected with a shell side steel shell into a whole by welding, and the tube plate 400 is uniformly provided with: the round hole exists and is used for providing an installation through hole for installation of the heat exchange tube. Further, the round hole is chamfered at the position outside the tube plate.
The heat exchange tube 300: the length of the heat exchange pipe is slightly longer than the conventional length, that is, after the heat exchange pipe is inserted into the through holes at both ends, both ends of the heat exchange pipe 300 are exposed by 3 to 5 cm, respectively, that is, enough fixed ends are left.
The assembly process of the heat exchange tube and the tube plate comprises the following steps:
firstly, the assembly between the heat exchange tube and the tube plate adopts a cold and hot assembly method, namely, the tube plate is heated to 100-150 ℃, the end part of the heat exchange tube is frozen to about minus 20 ℃, then the end part of the heat exchange tube is rapidly inserted into a corresponding round hole, the reserved length of the heat exchange tube is positioned by a positioning block, after the heat exchange tube and the tube plate are naturally cooled, the over-tight fit between the heat exchange tube and the tube plate is completed, the mechanical over-tight fit is formed, and the heat exchange tube has certain anti-permeability performance.
Then, preparing an adaptor 510, a conical seal 520 and a lock nut 530, wherein the adaptor 510 is formed by machining stainless steel bar and comprises a flange 511 and a cylindrical part 512, the inside of the cylindrical part is in a conical cylinder shape, i.e. a conical hole gradually reduces from a far end to one end of the flange, the outer surface of the cylindrical part is a threaded part 513, wherein the cylindrical part 512 is sleeved at the end part of the heat exchange tube at the outer side of the tube plate and concentrically corresponds to the round hole, positioning can be carried out by means of a positioning die to ensure that the adaptor and the heat exchange tube are concentrically arranged, and the flange 511 and the tube plate 400 are welded, referring to fig. 4 and fig. 5, the thickness of the adaptor is far larger than that of the stainless steel tube, and the thickness of the adaptor 510 is closer to that of the tube plate, i.e. about 30 mm, the welding of the adaptor 510 and the tube plate 400 is welding between thick stainless steel, and the welding position, the adverse effect of the welding stress on the round hole is reduced to zero, and after welding, even if small welding defects exist, perforation of the adapter or the tube plate can not be caused, the continuity of the welding position only needs to be ensured, and direct welding is not carried out on the stainless steel tube, so that the welding quality is reduced, and the welding can be finished without special welding skills. By changing the welding of the stainless steel pipe 300 and the pipe plate into the welding of the pipe plate 400 and the adapter 510, the welding part is a non-thin-wall structure part, leakage cannot be caused even if the welding is detached, and the problem that the leakage easily occurs at the welding point part of the stainless steel pipe during welding and later operation is avoided.
And then the conical sealing element is placed in the conical cylinder of the adapter, and the conical sealing element is compressed by using a fastening nut to deform the conical sealing element, so that the sealing of the heat exchange tube and the adapter is realized. After the conical sealing element is tightly pressed by the fastening nut, the gap between the connecting piece and the heat exchange tube is sealed for the second time, so that the sealing device has a good leakage-proof effect and belongs to gasket sealing.
The material is selected, and the fastening nut 530, the adaptor 510 and the tube plate 400 are made of the same material, such as stainless steel.
Example two
Referring to fig. 6, after the end of the stainless steel tube 300 is expanded, a swelling end 310 with a length slightly larger than 2 times of the tube plate thickness is formed at two ends of the stainless steel tube, the size of the round hole on the tube plate 400 corresponds to the size after the expansion hole, other installation steps are basically the same as the first embodiment, before the external fastening nut is fastened, a step is added, namely, a stainless steel sleeve 600 with a diameter of minus dozens of degrees is plugged into the swelling part, the stainless steel sleeve is a sleeve with the same specification as the stainless steel tube, after the stainless steel sleeve is plugged, the fastening nut is fastened, after the fastening, the temperature of the stainless steel sleeve 600 is raised, the swelling end of the heat exchange tube can be expanded from the inner side, and meanwhile, the swelling part with a thin wall can be effectively prevented from being locally deformed under the locking effect of the fastening nut, and the load resistance of the swelling part can be further increased during. And during the long-term service period, the expansion part at the position is not deformed.
EXAMPLE III
Referring to fig. 7, on the basis of the first embodiment, for the modification and technical extension of the second embodiment, a stainless steel sleeve 600 is added, the end of the stainless steel sleeve is provided with a circular disc, and after the fastening nut is fastened, the stainless steel sleeve is welded by using a welding mode, namely, a welding connection is carried out between the stainless steel sleeve 600 and the fastening nut 530, and the loosening resistance of the fastening nut can be increased after welding. Meanwhile, the end part of the heat exchange pipe is limited, and axial movement is prevented.
Example four
In the three embodiments, the stainless steel pipe is a straight pipe, that is, a pipe straight up and down. In this embodiment, in order to increase the heat exchange effect, the middle portion of the heat exchange tube 300 is spirally wound to form a pattern in which the middle portion is a spiral tube 320 and the two ends are straight tubes 330, referring to fig. 8, wherein the straight tube portion may also be formed into an expanded end after being expanded. During operation, under the effect of expansion with heat and contraction with cold of the heat exchange tube, the stress of relative sliding between the heat exchange tube and the conical sealing element can be avoided through the self deformation of the spiral tube, and the optimal state of sealing is ensured.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention and do not limit the scope of the present invention, and various modifications and improvements of the present invention may be made by those skilled in the art without departing from the spirit of the present invention as defined by the appended claims.
Claims (10)
1. The evaporator comprises a shell pass and a tube pass, wherein a working medium I is introduced into the shell pass, a medium II is introduced into the tube pass, the heat exchange tube comprises a spiral tube in the middle and straight tubes positioned at two ends, two ends of the heat exchange tube in the evaporator are in over-tight fit with the tube plate, and the end parts of two ends of the heat exchange tube respectively extend to the outer side of the tube plate and the exposed length of the heat exchange tube is not less than the thickness of the tube plate; it is characterized in that the preparation method is characterized in that,
the pipe fitting is characterized by further comprising an adapter piece, a conical sealing piece and a locking nut, wherein the adapter piece comprises a flange part and a cylindrical part, the interior of the cylindrical part is conical and cylindrical and is filled with the conical sealing piece, the flange part and the pipe plate are welded and fixed, and the locking nut is fastened on the cylindrical part and tightly presses the conical sealing piece;
the end parts of the two ends of the heat exchange tube are in an expanded shape, an expanded stainless steel sleeve is plugged into an inner cavity of the expansion, a circular sheet is arranged at the end part of the stainless steel sleeve, and the outer end of the stainless steel sleeve is welded with a locking nut.
2. An evaporator according to claim 1 wherein the adapter concentrically corresponds to the heat exchange tube.
3. An evaporator according to claim 1 wherein the heat exchange tubes are stainless steel or copper tubes having a thickness of 0.2 mm to 0.8 mm.
4. An evaporator according to claim 3 wherein the ratio of the heat exchange tube wall thickness to the tube sheet thickness is from 1:60 to 1: 30.
5. An evaporator according to claim 4 wherein the thickness of the adapter is equal to the thickness of the tube sheet.
6. An evaporator according to claim 1 wherein the fitting between the heat exchange tubes and the tube sheet is by a cold-hot fitting method.
7. An evaporator according to claim 1 wherein the fastening nut, the adapter, the heat exchange tube and the tube plate are made of the same metal.
8. The evaporator of claim 1, wherein the working medium i is a refrigerant, the medium ii is return water for heating, an inlet, an outlet and a sewage discharge outlet of the medium ii are arranged at the lower part of the tube side, and are separated by a partition plate, and a vent port is arranged at the top of the tube side; and a refrigerant inlet, a refrigerant outlet, a safety pressure relief valve and a thermocouple are arranged on the steel shell of the shell pass.
9. An evaporator according to claim 1 wherein the shell side and tube side interior walls are coated with a plastic liner.
10. An evaporator according to any one of claims 1 to 9 wherein the evaporator is used in an evaporation stage of a heat pump unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810199561.7A CN108507238B (en) | 2018-03-12 | 2018-03-12 | Evaporator and application thereof in heat pump unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810199561.7A CN108507238B (en) | 2018-03-12 | 2018-03-12 | Evaporator and application thereof in heat pump unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108507238A CN108507238A (en) | 2018-09-07 |
| CN108507238B true CN108507238B (en) | 2021-06-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810199561.7A Active CN108507238B (en) | 2018-03-12 | 2018-03-12 | Evaporator and application thereof in heat pump unit |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111486741A (en) * | 2020-04-22 | 2020-08-04 | 御隆膜科技南通有限公司 | Connecting structure of prefabricated joint type fluoroplastic heat exchange tube and tube plate and installation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002048489A (en) * | 2000-08-02 | 2002-02-15 | Inax Corp | Seal structure of pipe and tube plate |
| CN103217053A (en) * | 2012-01-18 | 2013-07-24 | 金沙 | Single pipe free telescopic structure of high-temperature air preheater |
| CN203772105U (en) * | 2014-03-20 | 2014-08-13 | 武汉东海石化重型装备有限公司 | Detachable type connection structure between heat exchange pipe and pipe plate |
| CN105202963A (en) * | 2015-09-29 | 2015-12-30 | 茂名重力石化机械制造有限公司 | Non-welding forced sealing structure for heat exchange tube and tube plate |
| CN205860851U (en) * | 2016-07-28 | 2017-01-04 | 珠海昊森万荣水处理科技有限公司 | The heat exchanger tube pipe bundle mounting structure of fast demountable |
-
2018
- 2018-03-12 CN CN201810199561.7A patent/CN108507238B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002048489A (en) * | 2000-08-02 | 2002-02-15 | Inax Corp | Seal structure of pipe and tube plate |
| CN103217053A (en) * | 2012-01-18 | 2013-07-24 | 金沙 | Single pipe free telescopic structure of high-temperature air preheater |
| CN203772105U (en) * | 2014-03-20 | 2014-08-13 | 武汉东海石化重型装备有限公司 | Detachable type connection structure between heat exchange pipe and pipe plate |
| CN105202963A (en) * | 2015-09-29 | 2015-12-30 | 茂名重力石化机械制造有限公司 | Non-welding forced sealing structure for heat exchange tube and tube plate |
| CN205860851U (en) * | 2016-07-28 | 2017-01-04 | 珠海昊森万荣水处理科技有限公司 | The heat exchanger tube pipe bundle mounting structure of fast demountable |
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| Publication number | Publication date |
|---|---|
| CN108507238A (en) | 2018-09-07 |
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